Papermaking machine



J1me 1941- F s. VANIVOORHIS 2, ,7

PAPERMAKING MACHINE Filed Aug. 10, 1939 3 Sheets-Sheet 1 M cu t\ m vimVENTok Fwd 5. Van vuurhi s BY Q ' ATTORNEY June 10, 11941.. F. s. VAN vom-ns' I I 2,244,745-

PAPERMAKING mourns Filed Au 10, 1939 V s Sheets-Sheet 2 June 10, 1941.s, VAN vo 2,244,746

PAPERMAKING MACHINE Filed Aug. 10, 1939 3 Sheets-Sheet 3 ULLIII/ IN INIll/ IIV /6 ll \l4 FIE .4.

INVENTOR Fran 5. Van Vnurhi5 z & S ATTORNEY Patented June 10, 1941UNITED STATES PATENT OFFICE PAPERMAKING MACHINE Fred S. Van Voorhis,Saugerties, N. Y. Application August 10, 1939, Serial No. 289,384

6 Claims.

This invention relates to-paper-making ma chines of the Fcurdriniertype.

One object of the present invention is to provide an improvedconstruction and arrangement for supplying the paper pulp to theFourdrinier wire for the purpose of increasing the efficiency of theoperation, increasing the production of the machine, and improving theuniformity, strength, and quality of the paper.

Another object of the invention .is to provide improved means for thefeeding of an increased amount of pulp to the wire when handling fibersrequiring an increased volume of water.

A still further object of my invention is to provide for the wire animproved construction of breast roll having suction means and anadjustable member spaced from the wire to provideo. feed slot andchamber for the pulp, and still another object is to provide animperforate member or "slow board having slicesor at least oneslice-cooperating therewith to control the fibers and form the paperupon the wire without at the same time extracting moisture therefrom.

Still another object is to provide removable and interchangeable membersadapted to cooperate with the breast roll to form feed chambers for thepulp of varying cross-sectional areas adapted for the handling of fibershaving different characteristics and for the production of papers ofvarying types, grades, and thicknesses.

Fig. 7 is a detail perspective view showing a modified form of said feedmember.

Referring to Figs. 1, 2, and 3, which show the so-called wet end of thepaper-making machine, the Fourdrinier wire i0 is carried on a perforatedbreast roll H mounted so as to rotate upon a stationary shaft l2 (Figs.4 and 5) which is connected to a suction pump and has perforations 13 sothat moisture may be drawn through perforations II in the roll ll. Endplates l5 secured on the hollow shaft l2 carry a stationary incompletecylinder l6 having a longitudinal gap extending between said plates I 5and through one-quarter of the circumference, as shown at Figs. 2 and 5,so that the action of the suction is restricted to the upper right-handsection of the roll I I, Fig. 2.

The pulp is fed to the wire III on the roll II from a flow box I! havinga central partition It by which it is divided into a receiving chamberI9 and a,delivery chamber '20. The pulp is fed to the receiving chamberl9 from a passage or channel 2| to which the pulp is supplied from a ro-I tating screen 22 and/or from a mixing box 23 With these and otherobjects in view, the invention consists in the novel construction andarrangement of parts hereinafter described, illustrated in theaccompanying drawings, and particularly pointed out in the appendedclaims, it being understood that various changes in the construction,form, and minor details may be made without departing from the spirit ofthe invention or sacrificing any of the advantages thereof.

In the drawings, 7

Fig, 1 is a somewhat diagrammatic and partly sectional view, showing oneend of a Fourdrinier machine;

Fig. 2 is an enlarged, cross-sectional detail view showing a part of theapparatus illustrated in Fig. 1:

Fig. 3 is a plan view showing the same end of the machine;

Fig. 4 is a longitudinal section of one end of the breast roll, taken onthe line 4| of Fig, 5;

Fig. 5 is a cross-section of the same;

Fig. 6 is a detail perspective view showing part of a pulp feed member;and,

having partitions 24, 25, to provide a tortuous passage for the pulp andhaving an inlet port 26, Fig. 1.

The rotating screen 22 may have a shower 21 of any known type, and pulpmay be supplied to the channel 2| from the screen 22 alone or may besupplied exclusively from the said mixing box 2-3, or alternatively pulpmay be sup plied to the channel 2| from both these supply sourcessimultaneously.

As the pulp is supplied through the receiving chamber l9 to the deliverychamber 20 of the box I! the level of the pulp reaches the outlet gateor slot 28, and the feed of the pulp may be regulated so as to vary thestatic head between the limits indicated at Figs. 2 and 3. At the loweredge of the gate or slot 28 the box I! is formed with an apron '29 forengagement with the wire upon the circumference of the breast roll H,while the upper edge of the said gate or slot is formed by the lowerextremity of an adjustable and interchangeable member 30 whichin theform shown at Figs. 1 and 2-is provided with a curved, arcuate surface31 which is spaced from, and substantially concentric to, thecircumference of the breast roll when in the adjusted position shown inthese figures. The member 30 is removably mounted on a back plate 3|havin toothed racks 32 engaged by toothed pinions 33 on a. spindle 34having a hand-wheel 35 by means of which the member 30 may be raisedorlowered tov adjust the width of the gate or slot 2% and to modify theshape of the ch "11 be: 36 formed between the said arcuate surface 31 ofthe member 30 and the surface of the wire upon the breast roll 1 i, andthe arrangement is such that upward movement of the member it from theposition shown at Figs. l and 2 increases the width of the slot 28 andso changes the shape of the chamber 36 that the upper extremity of thechamber increases to a greater extent than the lower extremity, so thatwhen the member 30 is in a raised position the pulp pass-= ing upwardlythrough the chamber 3% passes between diverging walls formed bythesurface 3i and the wire. The ends of the member 3%? are arrangedbetween fixed side plates 38 carried on the wall of the box I! andaprons of canvas and rubber of any suitable or well-known constructionare provided on the inner faces of the plates 38 for engagement with thesaid member at to prevent escape of the pulp which is thus supplied tothe upper horizontal reach of the wire l8 where it is acted upon by thedeckle 39 in the usual, well-known manner.

Beneath the upper, horizontal stretch of the wire l0, tube rolls 40 aremounted in the usual manner, and an important feature of this inventionis the provision of an imperforate plate or slow boar M located betweentube rolls 3E and beneath the wire Hi, this slow boardcoiperating withtwo or other suitable number of slices 2 adapted to control the fibersin the pulp in the manner required without at the same time increasingthe separation of water therefrom.

Referring particularly to Fig. 7, the member 43 is adapted to replacethe member 36 for use under certain conditions, these members it, d3

being formed with angle bars 44, 45 respectively having perforations bymeans of which they may be connected by removable screws 6? or otherwiseto the back plate 3!, Fig. 6. When it is desired to adapt the machinefor the handling of slow fibers, the member 43 is substituted for themember 30 so as to provide an enlarged chamber between the surface ofthe wire it on the breast roll H and the opposed surface of the saidmember 43.

An important eature of theinvention is the provision of means whereby alarger volume of moisture may be supplied in connection with thehandling of certain types of fibers. In such cases the pulp may besupplied from the box 23 and simultaneously from the screen 22, thestatic and the rolls, but not to the slices, and the maximum shakeimparted to the wire is at the extreme right-hand'end (Fig. 1) thereof.

' The improvements in the control of the operation increases the speedof production and the uniformity of the formation of the paper, theseparation of the moisture from the pulp takes place at that part of thewire at which the shake is at its maximum, so that the fibers are laidin a more eifective manner and the strength and quality of the sheets isthus improved. A further advantage is that satisfactory results can beobtained with wire of considerably less length than heretofore employed,.or, alternatively, wire of the'usual length may be employed withgreatly improved results.

Although the drawings and the above description disclose the bestmode'in which I have contemplated embodying my invention, I desire to bein no way limited to the details of such disclosure, for in the furtherpractical application of my invention many changes in form and construction may be made as circumstances require or experience suggestswithout departing from the spirit of the invention withinthe scope ofthe appended claims.

\ What I claim is:

1. A paper-making machine of the character described comprising a breastroll for the Fourdrinier wire, means for mounting saidroll on ahorizontal axis, a pulp-delivery chamber, a horizontal ledge fordelivery of the pulp irom said chamber to the wire on said roll on alevel with the roll axis, a member spaced from said ledge to form apulp-delivery slot, an arcuate surface formed on said member andapproximately conforming to the curvature of the roll andspacedtherefrom to form a pulp-receiving chamber, and means for adjusting saidmember to modify the width of the said slot and the capacity and shapeof the receiving chamber.

2. A paper-making machine of the character described comprising a breastroll for-the Fourhead in the chamber 20 of the box ll may be fiber thatforms very quicklyparticularly' a very long fiberthe moisture must passthrough the wire as uniformly as possible, and the fiber should have avery high percentage of water. This excess of water in the pulpnecessitates uniformity of drainage, and the improved apparatus isadapted, to suit varying conditions by the modification of the supply ofpulp, the variation in the static head in the box II, the adjustment ofthe slot 28, the variation in the chamber 36, regulation of the degreeof suction in the upper right-hand quarter of the breast roll lj (Fig.2) and the adjustment of the slices 42 above the slow board B l.

Shake or vibration is imparted to the wire by means of a crank device.48 through a connection 49, so that movemeiitv is imparted to the wiredrinier wire, means for mounting said roll on a horizontal axis and forimparting vibratory movement .thereto, a pulp-delivery chamber, ahorizontal ledge for delivery of the pulp from said chamber to the wireon said roll on a level with the roll axis, a member spaced from saidledge to form a pulp-delivery slot, means for varying the static head ofthe pulp above -said slot, suction mechanism in said roll, an arcuatesurface formed on said member and spaced from the surface of the roll toform a pulp-receiving chamber, and means for raising or lowering saidmember to increase or decrease the width of said delivery slot and tovary the capacity of said receiving chamber.

3. A paper-making machine of the character described comprising aperforated breast jroll carrying the wire, means for supporting saidroll in a horizontal position and for imparting vibratory movementthereto, a chamber for the supply of pulp, an apron carried by saidchamber forthe delivery of pulp from the chamber to the wire upon theroll along a line parallel to and approximately level with the rollaxis, an adjustable member having its lower edge spaced from said apronto form a variable pulp-delivery slot, a surface formed on said memberand opposed to the wire on the upper part of the roll to form therewitha chamber of variable dimensions, means for adjusting said member tovary the size of the slot and the chamber, tube rolls arranged beneaththe upper horizontal reach of the wire,

and an imperforate plate located beneath the said horizontal reach inproximity to said tub rolls, and at least one adjustable slice mountedover the wire above said plate.

4. A paper-making machine of the character described comprising aperforated breast roll carrying the wire, suction means for said roll,means for supporting said roll in a horizontal position and forimparting vibratory movement thereto, a box for the supply of pulp, anapron carried by said box for the delivery of pulp to the wire upon theroll along a line of maximum vibration, being a line level with the rollaxis, an adjustable member spaced from said apron to form a variablepulp-deliveryslot, a surface formed on said member and opposed to theportion of the wire above said slot, to form therewith a pulp-receivingchamber of variable dimensions, means for adjusting said member toregulate the depth of the slot and the shape and capacity of thechamber, an imperforate plate Fourdrinier wire and mounted on ahorizontal axis, an apron for the delivery of pulp from said slot tosaid wire at the level of said axis, a suction chamber in said rollextending from said slot to the commencement of the horizontal reach ofthe wire for extracting moisture from the pulp, a pulp chamber formedabout said suction chamber externally of the wire, means for varying thedimensions of said slot and the capacity and shape of said pulp chamber,means for vibrating said roll, an imperforate board beneath the upperreach of the wire, and a plurality of adjustable slices cooperating withsaid board to control the fibers without expressing moisture from thepulp.

6. A paper-making machine of the character described comprising afiber-mixing box, means for receiving pulp from said box, apulp-delivery slot in said means, a perforated breast roll carrying theFourdrinier wire and mounted on a horizontal axis, an apron for thedelivery of pulp from said slot to said wire at the level of said axis,a suction chamber within said roll extending from said slot to thecommencement of the horizontal reach of the wire for the initialextraction of moisture from the pulp, a pulp chamber formed around saidsuction chamber externally of the wire, means for varying the dimensionsof said slot and the capacity of said pulp chamber, tube rolls beneaththe upper horizontal reach of the wire, means for vibrating all saidrolls, an imperforate board beneath the upper reach of the wire inproximity to said tube rolls and an adjustable slice cooperating withsaid board to control the fibers upon the wire without at the same timeexpressing moisture therefrom.

FRED S. VAN VOORHIS.

